Organs of movement in invertebrates

In this topic

• Support and movement in hydra
• The skin-muscle sac in worms
• How an earthworm moves
• Molluscs and arthropods

Key terms

• Mesogloea
• Hydroskeleton
• Skin-muscle sac
• Circular muscle
• Longitudinal muscle
• Bristle
• Muscular foot
• Jet propulsion
• Chitin
• Jointed limb
• Moulting
• Wing

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